@article{echevarria_nascimento_gerônimo_miller_giesbrecht_1999,  title={NMR Spectroscopy, Hammett Correlations and Biological Activity of Some Schiff Bases Derived from Piperonal},  volume={10},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50531999000100010},  DOI={10.1590/S0103-50531999000100010},  number={1},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Echevarria, Aurea and Nascimento, Maria da Graça and Gerônimo, Vanilde and Miller, Joseph and Giesbrecht, Astréa},  year={1999},  month={Jan},  pages={60–64} }